CN101308056B - Pipeline Leakage Monitoring Device and Technology - Google Patents

Abstract

Pipeline leakage monitoring device and technology. A sensor that indicates when the medium in the pipeline is in a static state, that is, when the flow rate of the medium is "zero". Multiple sensors can be connected in series on the pipeline network to instantly monitor the range of leakage points on the pipeline network.

Description

Pipeline leakage monitoring device and technology

One, state indication operation valve:

Traditional pipeline control valve, can not indicate valve is in conducting state, or in closed condition.Use the circuit catenation principle of regulator of fan, by the patching panel of regulator of fan knob below, be arranged on the below of valve knob, only, when knob is in the closed position, be communicated with two wiring points of below, conducting state has some butted line points, similar with several grade of electric fan, the location status information of valve knob can be sent out like this.

Two, high-precision rate-of flow non-" zero " sensor:

Fig. 1: (1) housing, (2) gas outlet, (3) pressure-sensitive diaphragm, (4) pressure spring, (5) push rod, (6) trim ring that pressure regulation is used, (7) and (9) are for stablizing the device of push rod and (8), (8) little spring, (10) micro-electric switch, (11) overhead guard, (12) pressure-reduction outlet, (13) air intake opening.

Fig. 2: (14) bottom spring.

Whether accompanying drawing shown device can be that " zero " indicates to pipeline medium amount of flow.

The pressure at pressure-reduction outlet in figure (12) two ends obviously should not equate, when ducted medium remains static, pressure-reduction outlet must be blocked, otherwise hyperbar enters end low-pressure line, can cause damage.In cavity under pressure-sensitive diaphragm (3), pressure will reach maximal value, cavity expands, pressure-sensitive diaphragm (3) shrinks pressuring spring (4), and push rod (5) is moved upward, and the button of micro-electric switch (10) is pressed, now push rod has risen to extreme higher position, upwards pull the lever of lower end interlock, pressure-reduction outlet (12) end is firmly blocked.When medium outwards flows, cavity internal pressure will reduce, spring (4) is upheld, promoting diaphragm (3) and push rod (5) moves downward, the button of micro-electric switch (10) is released, the lever of push rod (5) lower end interlock, will make pressure-reduction outlet (12) end do not blocked.Facts have proved, little spring (8) can, can be substituted by the little spring in micro-electric switch.

Fig. 2, on the basis of Fig. 1, set up bottom spring (14), when air intake opening (13) enters without medium, bottom spring (14) extension of upspringing, make push rod (5) just press the button of micro-electric switch (10), micro-electric switch (10) provides the immobilising indication information of medium, when having higher pressure medium to enter air intake opening (13), the plug of high-pressure medium compressing pressure-reduction outlet (12) end (on lever), the push rod (5) of lever other end interlock is pulled downwards, unclamp the button of micro-electric switch (10), and oppress bottom spring (14) and shrink.When gas outlet (2) outwards mobile medium be suddenly stopped while flowing, pressure in chamber will increase, diaphragm (3) will make push rod (5) move upward, push rod (5) upper end will be pressed the button of micro-electric switch (10), the lever of lower end interlock, makes pressure-reduction outlet (12) by the shutoff of being exerted oneself.The high-pressure medium of air intake opening end, can not flow out from pressure-reduction outlet (12) again, and the pressure in chamber will be stablized constant.

In sum, when ducted medium remains static, the flow of medium is " zero ", gas outlet (2) and its together with cavity in, pressure must be maximal value, must cut off into two regions of high-low pressure by handle assembly, with timer, will outwards send out a switched electrical signal.Two regions that described in figure bis-, device is cut off, pressure can equate.

Indicate the device of pipeline medium in immobilising stationary state, it is characterized in that: the medium in handle assembly cuts off into entrance point and two regions of endpiece, and in partition apparatus internal channel, device sends out an indication information.

Three, the monitoring technology to pipe network

The inventor introduces in Chinese patent < < medium flow sounding device in pipeline > >, can on pipe line, be connected in series the device of a plurality of indication media flow states, and this device can further send out the information such as the flow, total amount of medium.As register one's residence fuel gas network and the network of rivers from the beginning, every household is all equipped with this sensor, on each corridor ,Mei Dong Lou, community interior conduit bifurcation, respectively pacifies one, but on main conduit one of each kilometer peace.Generally at midnight, every household is during all without G&W, and whole pipe network, all in monitoring state, can be measured the scope of leakage point in time.Facts have proved, can utilize the storage function of corridor interior conduit, automatically controlled " state indication operation valve " of closing in this device of corridor, do not affect just conventional gas and the water of every household, certainly should be selected in water and with the non-peak period of gas, close by force this device of pipe end (in corridor), can carry out leak detection to whole pipe network.Because pipeline medium is when the static state, each monitoring point all should be maximum force value, so available simple pressure transducer substitutes the ultrasonic flow meter of high price.

Each monitoring point on main conduit, when medium is when revealing proper flow, the flow of each monitoring point should be consistent, and pressure also should meet certain rule, otherwise should judge leakage, closes main conduit end outlet, carries out Static Detection.

Four, user's water meter is different from gas meter, flow meter, there is no potential safety hazard, this sensor and the integrated product of IC-card water meter, when sensor has the mobile indication information of tap water, and during water meter machinery-free metrical information, the pass valve of generally can not reporting to the police, intelligent apparatus can carry out low discharge metering.When so long-term, as three days mechanical metrical informations without water meter, and sensor often had the mobile indication information of tap water, confirmed " extremely table ", and valve-closing, reports for repairment.

Five, domestic gas system: sensor and the integrated device of IC-card gas meter, flow meter.

1, sensor has indication (referring to have the indication of media flow, lower same), and table is without metering, kitchen range have flame, and (by thermopair etc., can, flame information, being sent in table) judges that this table is as " extremely table ", in 10 seconds of E class prompt tone, valve-closing after three hours, reports for repairment.

2, sensor is without indication, and table has metering, and valve-closing is restarted, and continuous quadratic is still like this, and sensor fault closes valve maintenance.

3, sensor has indication, and table is without metering, and without flame, after valve-closing, sensor, without indication, illustrates pipeline leakage, provides 10 seconds G class prompt tones, after maintenance is good, presses and restarts key.After valve-closing, sensor still has indication, may be to leak in sensor, or leak before valve, 10 second H class prompt tone, should close artificial main valve (being indoor maintenance valve), and window, report for repairment.

4, the operation valve between the hose-rigid pipe in opening kitchen on gas pipeline, combustion gas has flowing of individual moment to stop, and illustrates that pipe safety is reliable, and native system provides the category-A safety instruction sound in 2 seconds.

5, when combustion gas is finished using, should first close the operation valve between hose-rigid pipe, then close kitchen range valve.Now combustion gas stops flowing, and each combustion gas stops flowing, and native system all provides the category-B safety instruction sound in 2 seconds.

6, sensor has indication, and table has metering, has flame, is just commonly using gas, provides the F class prompt tone in 2 seconds.

7, sensor has indication, and table has metering, without flame, leaks, and provides the G class prompt tone in 10 seconds, then valve-closing.

8, when not monitoring burner flame:

When combustion gas has one to stop mobile indication information, in one minute, again flow, and no longer stop, being considered to normally use combustion gas.Provide the F class prompt tone in 2 seconds.

Otherwise combustion gas is flowed (flowing time was over 2 seconds) always, before 1 minute, without stopping mobile indication information, native system provides the C class prompt tone in 10 seconds, then valve-closing.

When fuel gas flow surpasses 2 hours, native system provides the D class prompt tone of 1 minute, then valve-closing.

User can, by safe handling bond bundle C, the D class prompt tone on table, also can press and restart key and rework.When fuel gas flow, native system can provide controls the indication information that ventilation equipment is opened.

As combustion gas is identified as proper flow, and the metering of table nothing, " extremely table ", disposal route is the same.

9, timing function:

User can set voluntarily timing prompting and close the time of valve, sets minute single and uses and repeatedly use.Single is used: as this, heat up water and need 15 minutes, ring the F class prompt tone in 10 seconds after 15 minutes, nobody processes valve-closing.

Repeatedly use: as each maximum duration of combustion gas of using is set as to 1.5 hours, use gas after 1.5 hours at every turn, ring one minute D class prompt tone, nobody processes valve-closing.D class prompt tone can be melodious music, the time capable of regulating ringing.

10, music tip:

User can normally use by key assignments the music tip of gas, and can by key control, it suspends, and rings after 1 hour again.

Claims (2)

1. the pipeline leakage monitoring method of the sensor in immobilising stationary state based on indication pipeline medium, it is characterized in that: described sensor comprises housing (1), gas outlet (2), pressure-sensitive diaphragm (3), pressure spring (4), push rod (5), micro-electric switch (10), pressure-reduction outlet (12), air intake opening (13), when ducted medium remains static, in cavity under pressure-sensitive diaphragm (3), pressure will reach maximal value, cavity expands, pressure-sensitive diaphragm (3) will be oppressed pressure spring (4) and be shunk, and push rod (5) is moved upward, the button of micro-electric switch (10) is pressed, now push rod (5) has risen to extreme higher position, upwards pull the lever of lower end interlock, pressure-reduction outlet (12) end is firmly blocked, medium in sensor is cut off into entrance point and two regions of endpiece, when cutting off sensor internal channel, sensor sends out the immobilising information of indication medium, when medium outwards flows, cavity internal pressure will reduce, pressure spring (4) is upheld, promoting pressure-sensitive diaphragm (3) and push rod (5) moves downward, the button of micro-electric switch (10) is released, the lever of push rod (5) lower end interlock, will make pressure-reduction outlet (12) end do not blocked, described method comprises: described sensor and flowmeter can be connected in series a plurality of on network of pipelines, and the information of sensor and flowmeter can be transferred back to control center, do not dividing on the trunk pipeline at fork, the flow of each monitoring point should be consistent, and pressure also should meet certain rule, otherwise should be judged to be leakage, close major trunk roads end outlet, can carry out static monitoring techniques, for fork pipelines, the flow of entrance point should equal the flow sum of each branch outlet end.

2. an intelligent gas meter, comprises sensor described in claim 1, and when sensor is indicated ducted fuel gas flow, intelligent gas meter provides the indication information of opening ventilation equipment.

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